I heard stories about existing sites putting together applications for new reactors. Progress is one utility that I have heard of trying to do this.
Here's what I have for announcements to investigate new plant construction (i.e. pre-application notification, not necessarily a commitment to build).
Utility / Site / Design
Constellation Calvert Cliffs 3 EPR
Constellation Nine Mile Point 3 EPR
Dominion North Anna 3 ESBWR
Duke (w/ Southern Nuclear) Cherokee Falls 1 AP1000
Duke (w/ Southern Nuclear) Cherokee Falls 2 AP1000
Entergy River Bend 2 ESBWR
Exelon Clinton 2 Undec.
FPL Unannounced Site in SE US Undec.
NuStart Bellefonte 1 AP1000
NuStart Grand Gulf 2 ESBWR
Progress Shearon Harris 2 AP1000
Progress Shearon Harris 3 AP1000
Progress Unannounced Site in Florida 1 AP1000
Progress Unannounced Site in Florida 2 AP1000
SCANA Summer 2 AP1000
SCANA Summer 3 AP1000
Southern Nuclear Vogtle 3 AP1000
Southern Nuclear Vogtle 4 AP1000